James b



UNITED STATES PATENT OFFICE.

JAMES B. STANIVOOD, OF CINCINNATI, OHIO, ASSIGNOR TO THE LANE & BODLEY COMPANY, OF SAME PLACE.

STEAM- GENERATOR SPECIFICATION forming part of Letters Patent No. 359,333, dated March 15, 1887.

Application filed September 24, 1886, Serial No. 214,425. (No model.)

To all whom it may concern:

Be it known that 1, JAMES B'. STANWOOD,

a citizen of the United States, residing at Oinoinnati, Ohio, have invented new and useful Improvements in Steam-Generators, of which the following is a specification.

My invention relates to steam-generators;

its object being to produce a simple, cheap, and efficient boiler, combining strength, large heating-surface, and portability, with a view, more particularly, to driving portable sawmill engines and outdoormachinery, in which straw, wood, and other easily-accessible fuel may be used, or coal, if desired. I 5 To this end my invention consists in the features of construction hereinafter described, in which the cylindrical boiler is provided with a saddle-shaped fire-box extending from end to end, the vertical sides of which fire-box are extended downward through the boilershell to constitute a resting support for the boiler; also, in which the tie-rods, mounted upon and secured to horizontal angle-irons riveted to the inner walls of the fire-box at the 2 5 joint of the outer shell, serve also as the supports for the grate-bars; also, in which the bridge-wall is composed of a series of horizontal circulating-tubes crossing the fire-box in vertically-arranged series, all as more fully set forth in the following description.

Referring to the drawings illustrating my invention accompanying and forming part of this specification, Figure 1 is a side elevation of the generator complete, sectioned axially. Fig.2 is ajfront end elevation of the generator, with part of the furnace and smoke-arch front removed.

The parts referred to herein are indicated in said drawings by letters of reference.

In the drawings, A designates the outer shell of the boiler, and B the shell of the firebox. The former is cylindrical at the top and sides throughout, continuing its circular section uutil joined to the exterior of the firebox shell below. The fire-box shell B is cylindrical at its upper portion throughout the length of the boiler, with sides I) b continued downward vertically or obliquely beyond the outer shell to asuificient depth to form the ash- 50 pit. At the junction of the two shells A and 1 B, I place an angle'iron, a, at each side, within the inner shell, which may be secured by the same line of riveting.

To the horizontal flanges of the angleiron I secure cross-bars 0 0'0", preferably constructed" and arranged as follows: Two of these, of sufficient dimensions for strength only, are placed atandnearthe front of the boilerproper,spaced apart to form end supports for the grate-bars d, and a third, which is substantially a strong and wide plate, is placed in rear, so that its front edge forms a support for a second set of grate-bars, (1', whose front ends rest upon the center cross-bar, c, the plate being continued at the rear beyond the boiler-shell to form the bottom of the smoke-box 0 connecting with the return-fines.

At the front of the boiler the shells A and B are extended forward beyond the forward flue-sheet, e, to form a smoke-arch, D, around the inner shell, which is closed in front by sheet-iron casings with hinged doorsf, for access to the lines. At the rear a sheet-iron covering attached to the rear flue-sheet, g, constitutes, with the extended rear cross-sheet, c the rear smoke-box.

At the rear of the grate-surface I place a series of horizontal cross-tubes, h, entering through the fire-box sheet 13 at both sides and arranged in vertical series, there forming, individually, a series of circulating-tubes, and, collectively, a bridge-wall for the furnace. They are'placed sufficiently apart to permit the products of combustion to pass between. The boiler is stayed by a course of vertical braces, 8 5 6, extending in longitudinal series from front to rear between the outer and inner shells in a vertical axial plane, and by two or more series of side braces, i 1'. Between said shells, in the space just above their side j unction,suit- 9o able hand-holes, Z, and clearing-apertures m are also provided, with proper closures, and also a central steam-dome, E, and uptake F. A fire-door casing is also provided for the front inner shell opening.

The structure is designed to rest upon asuitable base-frame, G, wherean angle-iron foot, u, may be provided.

As thus constructed the boiler is economical in construction, and by the disposition of ma- 100 terial possesses great resisting strength against all strains of use. Moreovenit is comparatively light and portable, and I also secure a large furnace-opening, giving abundant room for the combustion of light materia1such as straw, brush, wood, &c,-without any sacrifice of strength or any waste of space or material.

I claim as my invention and desire to secure by Letters Patent of the United States- 1. In a steam-generator, the combination of the cylindrical outer shell open at the bottom throughout its length, the inverted-U shell arranged within and extending through the same, forming a fire-box, combustion-chamber, and a resting-support for the boiler, and crossties secured across the inner shell at the line ofjnnction of the two shells, substantially as set forth.

2. The combination and arrangement of the cylindrical outer shell open longitudinally throughout at its bottom, the inverted-U shell placed within and extending through the outer shell for its entire length and forming a support for the structure, and cross-ties arranged across the inner shell and secured to an angleiron held at and by the lines ofrivets connecting the two shells, substantially asset forth.

3. The combination of the outer shell and the inner shell, constructed and arranged as shown, a forward tie forming a support for the fire-front and forward set of gratebars, a central tie supporting the contiguous ends of the front and rear grate-bars, and a rear tie widened into a plate supporting the rear gratebars and constituting a bottom for the combustion-chamber and rear SillOliO ZllCl], substantially as set forth.

4. The combination, in a steam-generator, of the cylindrical outer shell open throughout at the bottom, the inverted-U shell arranged within the same, with legs extending through and forming a support for the structure, 'the cross-ties arranged to tie the parts at the line of junction and form supports for the grate-bars and a bottom for the combustionchamber and rear smokearch, and independent casing secured upon the projecting end of the rear tie-plate against the rear end of the boiler and constituting the rear smoke-arch, and the front flue-sheet setback to form between the outer and inner shells a front smokearch, all constructed and arranged as shown, for the purposes set forth.

5. In a steam-boiler, the combination of the cylindrical outer shell open throughout at the bottom, the inverted-U -shaped shell with legs extending through and forming a support for the structure, cross-ties arranged across the inner shell to tie the inner and outer shells at the line of junction and forming supports for the grate-bars and a bottom for the combustionchainber, and a series of circulating-tubes arranged in a vertical plane across the inner shell, constituting a bridge-wall dividing the furnace proper from the combustion-chamber, as and for the purpose set forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesscs.

J AMES B. STAN\VOOD.

Vi tnesses:

L. M. HOSEA, C. D. KERR. 

